Burglarproof key lock



06% 1929- H. H. HATHAWAY BURGLARPROOF KEY LOCK Filed Jan. 21, 1928 INVENTOR. fiewn/ /z fl r/wnwr ATTORNEY.

patented Oct. 15, 1929 PATENT HARLOW H'. HATHAWAY, or Los' ANGELES, CALIFORNIA.

BURGLARPROOI KEY Loci:

Application filed January 21; 1928. Serial no; 248,328;

My'invention relatesto key locks whereby a key may be prevented from being turned aftertliedoor has been-locked so that said'key may not be turned by the insertion-inthe'key hole of'an implement for this purpose, the

key remaining within the look at all times after said key has engaged the'tumblers of the lock, until thekey lock has been disengagedit being'possible to turn said'key at all m times'when the key lock hasbeen disengaged with said key. p

It accordingly is an" obj ectof my invention to providea novel form of burglar proof key lock in which a key holeengaging member of preferred construction is positioned at all timesupon theshank of the key, said'key being provided with means,-such as holes, serrations or the like, with which a key engaging" device, 'movably associated with said member, is adapted to'beengaged, so that said key, when said key engaging device is disengaged will be permitted to be turned freely within said member but whensaid device is engaged with said key the latter will be prevented frombeing turned.

' It'i's also within the province of my invention to provide a key engaging member which isa'dapted topr'event' any key'of any character, whatever from being turned, additional members or devices being provided whichare equipped with means adapted to be engaged by a lockingmeans, said membersthus functioning to'prevent the key from turning.

The above and further obj ects and advantages'of my" invention, as will hereinafter more fully appear, I attain by the device eonstructe'din accordance with the descrip tion and illustration" on the drawings form ing a part of my application.

Reference is had to the accompanying drawings, in which similar reference characters denotes similar parts.

In'the drawings,

Fig; 1 is a side elevational view of one form ofiny invention applied to a key,

Fig. 2 is a cross-sectional view, taken on the lineQ-Q, Fig. 1', looking in the direction ofthe'arrows, but showing the key engaging means disengaged from the key and thus permitting the turning thereof,

Fig. 3 is a similar view showing the key engaging means in engagement with the key, and thus preventing the key from being turned,

Fig. 4 is a view similar to Fig. 1 but showing a modified form of key hole engaging member,

Fig. 5 is a cross-sectional view, taken on the line 5'5, Fig. 4, looking in the direct-ion of the arrows, but showing the key locking device disengaged, 7 r I Fig. 6 is a similar view, showing'the'key locking device in engagement with thekey,

Fig. 7 is a side elevational vew'of another modified form of my invention, illustrating a modified key, and a somewhat different key hole engaging member, and key locking device,

Fig. 8'is a cross-sectionalview, taken on the line 88, Fig. 7, looking in the direction of the arrows, the key engaging mea'ns'being disengaged,

F ig; 9 is a similar view, showing the key engaging means engaged,

Fig. 10 is a view similar to Fig. 1, but'illustrating a still further modified form of my invention,

Fig. 11', is a cross-sectional view, taken on the line 11-11, Fig. v10, showing the key locking device disengaged,

Fig. 12, is a similar view, showing the key locking device engaged,

Fig. 13 is a side elevational view of" a still further modified form of my invention,

Fig. 14 is a cross-sectional view taken on the line 141 1, Fig. 13, showing the locking device disengaged,

Fig. 15 is a similar View, showing'the locking deviceengaged, and A Fig. 16 is a fragmentary longitudinal cross-sectional view, taken on the line 16-16, Fig. 13. V

Describing my invention more in detail, it is my purpose to provide a key with a key hole "engaging means for preventing said key rmn being turned by the'insertion in the keyhole of an implement to turn said key, said invention being adapted to be applied to any key of any character and design.

As seen'in Fig. 1 of the drawings, the key 2, which has a round shank 4, is provided with a set of holes, perforations, depresslons, serrations or the hire 7 for a purpose presently to be described, said key in practice taking any form desired with a fiat shank or itself being a flat key of any kind.

Mounted upon the key 4 is a keyhole engaging means or member 6 which in practice may take a number of forms and still remain within the province of my invention, said member having a cylindrical or other shaped portion 8 for surrounding the shank 4 of the key 2, said shape depending upon the configuration of the shank, sufiicient clearance between said shank and said portion being provided so that the key may be freely turned therein. The lower part of the member 6 is preferably flattened and of such a width that it may conveniently be inserted within the keyhole of the lock. The key 2, together with the member 6, is inserted in the key hole of the lock, it being possible at all times to turn the key in. the lock, and in the member 6, until said memher is locked to the key in the manner presently to be described.

The member 6 may be formed from a single piece of sheet material, by stamping, cutting, or in any manner desired, and shaped in the preferred form, it being within the province of my invention to manufacture the same to suit the practical needs or contingencies. The lower portion of the member 6 may be crimped or corrugated, as shown at 10, for strengthening the same, or said portion may be flat and held close together, or secured together, either without an intervening spacing device as hereinafter more fully described.

The means for looking or detachably securing or engaging the member 6 with the key 2 may be any in practice preferred, and I have shown a number of modifications to this end.

In the form shown in Figs. 1, 2 and 3, a de vice 12 for engaging the member 6 is shown.

- This device may be pivoted to, slidable with,

or fixed in respect to the key hole engaging member 6, said device having associated therewith in any preferred way a means for engaging the perforations, depressions, holes or serrations 7, so that the key will be locked against any movement.

In said figures the device 12 is slidable vertically, and is corrugated as at 14 to fit the corrugations 10 of the member 6, thus preventing an endwise movement, a key engaging element 16, associated in any preferred way with the device 12, being adapted to enter the holes 7, thus preventing the key from movement. Depending upon the particular means 7, the part 16 may be a pin, prong or any element desired. The friction of the sides 14 holds device 12 in either operative or inoperative position.

In operation, the key 2 is inserted within the keyhole with the member 6 engaging the latter, the device 16, as shown in Fig. 2, being out of engagement with the holes 7. In this condition, the key may be turned freely for locking and unlocking the door. To make the key burglar proof the key is turned with the shank in the position shown in Fig. 3, and the device 16 pushed home within the holes 7, the member 6 being thus locked within the keyhole, effectively preventing any turning of said key within the look by the insertion of an implement from the outside of the door.

In Figs. 4, 5 and 6, I have shown another form of my invention in which the member 6 is formed with a hinge portion 9', a top member 8 being crimped over or otherwise associated with the upper curved parts of the member 6, a spring device 12 provided with a projection 16 being associated in any preferred manner with said member and arranged to be pressed into holes provided in the key shank and penetrating the member 6', which latter as shown is substantially a cylindrical spring. The operation of this form of my invention is identical with that previously described, Fig. 5 showing the key unlocked,

and Fig. 6 in locked condition.

Figs. 7, 8 and 9 show another modified form of my invention in which the key 2 has its shank 4 modified with a thickened part provided with a groove along which the member 6 is adapted to be slid, the upper portion 8 of which is equipped with a crimped part 5 perforated as shown in F ig. 9, for the reception of the pin'16, secured to the vertically slidable element 12", a spacer 11 being positioned between the lower parts of the member 6", and riveted or otherwise secured thereto. The operation of this form is the-same as heretofore described, and hence need not be repeated.

Figs. 10, 11 and 12 show a still further modified form of my invention with the same operation, the only changes being theshape of the member 6 and the serrations or cut out portions 7 of the key.

In Figs. 13-16 inclusive a key is shown, provided with half round perforated pieces 17 slidablebut non-rotatable thereon.

The member 6 is crimped about the half round pieces, which are provided with holes for engagement by pin l6 mounted on a vertically slidable element 12 which embraces the member 6. The key with its half round pieces 17 is free to be turned within the member 6 when the parts are in the position shown in Fig. 14, but when the parts are in the position shown in Fig. 15, that is, with the pin 16 engaged in the holes of the half round pieces, the key is rotatable with the member 6 united to i ..While I have thus described my invention with great particularity, it will be clear that the same may be modified throughout a wide range. I accordingly do not desire to be limited to the exact details of construction shown and described, but reserve the right in practice to make any and all modifications thereof that fall within the scope of the appended claims.

I claim as my invention:

1. In a key look, a key, a set of key engaging members Within which said key 1s adapt ed to be moved, a key hole engaging device surrounding said members and adapted to I engage the key hole of a lock, and key locking means on said device for engaging said members to prevent said key from being turned.

2. In a device of the class described, in combination With a key having perforations extending at an angle to the Ward thereof, means engaging the key shank from opposite sides thereof and facedly rotatable thereabout, and means on one of said key engaging means to lock both of said key engaging means upon the key by engagement with the perforations thereof.

3. In a device of the character described, in combination with a key, means engaging the key shank and shaped for insertion in a key hole, means engaging said means to connect said first-named means to the key shank, said last-named means and said key having mutually engaging means for locking said key engaging means upon the key shank, and at an angle to the Ward thereof.

4. In a device of the character described, in combination With a key, a key hole shaped member rotatably engaging the key shank, a yielding means engaging said member to connect same loosely to said shank, and mutually engaging devices on said key and yielding means to lock both said member and yielding means upon said shank and at an an le to the Ward thereof.

in testimony whereof I have signed my name to this specification.

HARLOW H. HATHAWAY. 

